21515879

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{12149}}^1$

素因数の和:12190

約数の個数: 16

約数和(自身を含む): 27993600

約数和(自身を除く): 6477721

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 12149, 85043, 133639, 279427, 935473, 1955989, 3073697, 21515879]

約数ペア:

[(1, 21515879), (7, 3073697), (11, 1955989), (23, 935473), (77, 279427), (161, 133639), (253, 85043), (1771, 12149)]